Charles somner brown



C. S. BROWN.

TRANSMiSS lON LOCK. APPUCAUON FILED MAR. 18, m9.

CHAQIM WIT/1158853 44' CHARLES SOMNER BROWN, OF EAST CHICAGO, IND.

TRANSMISSIONLOUL Specification of Letters Patent.

Patented 2, 1919.

.application led March 1B, 1919. Serial. No. flw.

To all whom it 'may concern:

Be it known that l. CIL-xmms SOMNER llnowiv, a citizen ot the UnitedStates, and a resident of lla'st Chic-ago, in the county of Lake andState of Indiana, have invented certain new and useful Improvements inTransmissionLocks, of which the following is a specification. v

lily invention is an improvement in transmission locks, and has for itsobject to provide a device of the charac-ter specified for use inconnection with the transmissions of motor vehicles, for locking saidtransmissions in neutral position.

ln the drawings:

Figure l is a longitudinal section through a transmission controllinglever provided with the improved lock;

Fig. 2 is a similar view of the upper end of Fig. 1, with the parts inanother position;

Fig. 3 is a view similar to Fig. 2, showing the parts in lockedposition;

Fig. l is a view similar to Fig. 1, showing the parts in lockedposition;

litigi. 5 is a section on the line 5-5 of Fig. l; h

Figs. 6 and 7 are sections on the lines 6-6 and -J?, respectively, ofFig. Lt;

Fig. 8 is a perspective view of thev lock and tumbler.

rthe present embodiment of the invention is shown in connection with atransmission controlling lever 1 of usual construction, said leverbeing; tubular and having' intermedia te its ends the ball .2 by meansof which it may be pivotally mounted. At the lower end oi" the leverthere is arranged a bracket 3 having a tapering opening 4.wlxicli,\\'hen the lever is in neutral position. will aline with thebore 4 of the lever.

1INithin this bore is mounted to slide a hacking rod 5. the said rodhaving!v at its upper end and above the lever a controlling knob 6, andit-will be noticed that at each end of the rod there is an enlargement 7and 8, respectively, the. enlargement 8 beingr adjacent to the `knob 6.The enlargement 7 tits within a reamed or counterbored portion 9 in thelower end of the lever, and the largd portion 8 fits within a similarportion 10 at the upper end oi1 the lever. A coil springF 11 encirclesthe rod between the lower end of the enlargement 8 and the bottom of therounterbore l0, andacts normally te force the locking rod upward.

The enlargement 8 is provided near the knob with a, longitudinaliextending key 12, and this key is adapte to move within an annulargroove or enlargement 13 in the portion 10 of the bore of the lever whenthe rod is in locking position. A passage 1% leads to the annular groovelhthesaid groove being spaced slightly beiow the upper end of the lever,and it-will be evident that the key 12 must be made to register with thepassage 14 before vthe rodmay be moved downward into locking position.After the rod is in locking position, when the key 12 is turned out ofregister with the passage 13, the rod is held from upward movement underthe influence of the spring, thatis, it is heid in locked position.

A lock 15 of any suitable type is mounted to rotate in the upper end ofthe knob, the said knob serving as a casing for the rotata-j ble portionof the loclr, and the said lock may be of any suitable or desired type,as, for instance, a Yale lock, and it is operated` by a key 16. Thisrotatable portion 15 of the lock has an external spirally arranged Slt)rib 17, and this rib is adapted to engage a.

transverse notch 18 in a tumbler 19 which, in turn, is adapted to engageat its lower end the passage 14 lwhen the knob is in locked position toloch the rod to the lever. The tumbler also has a laterally extendin lug20 at its upper end which moves wit in a recess 21 in the knob, limitingthus the lnovement of the tumbler in each direction. VReferring to Fig.4, it will be noticed that the enlargement B is independent of the rod,the rod being threaded into an opening in' the lower end of the saidenlargement. `rThis is to facilitate assembling and disassainbling thelocking rod. l

In use, with the parts in the position of Fig. 1, that is, with thelever in released positlon, it may be operated in the .usual man ner, bymeans of the knob 6. When it is de-A sired to lock the transmission, thelever is moved into neutral position, at which time the taperinglopening' t will register with the bore ot the lever. The knob is vnowturned until the key 12 registers with the passage 14, and the knob isdepressed. The enlargement 7 of the rod moves into the tapering recess4, thus looking the transmission, and` when the knob is turned the key12 moves out of register With the passage 14 and into the groove 13.lllhen the lock is turneiil in the pro er direction, the tumbler 19 willmoved ownwardly mto the position of Fig.

l, engaging the passage 14C and .preventing any rotative movement'of theknob. Thus 'the transmission lever is not only locked in neutral.position but the lock is locked against release until the proper key ismade luse of.

l claim: i

'1. The combination with the tubular gear shifting lever, of a lockingrod Fitted within the lever, a keeper at the lower end of the leverhaving an opening for receiving tlie rod to lock the lever in neutralposition, a

spring normally acting to liolcl the locking ment of the rod withrespect to the lever sad tumbler moving longitudinally ofthe ro 2. Thecombination with the tubular gear shifting lever, of a locking rodfitted within the lever, a keeper at the lower end of the lever havingan opening for receiving the rod to lock the lever in neutral position7a spring normally acting v.to hold the locking rod out of enga ementwith the keeper,

means controlled y the turning of the rod in the leverfor locking thelever with the rod in locking. position, said means comprising a key onthe rod, and an annular keyway in the lever having a longitudinalltxvextending portion leading,r to the outer end of the lever.

` CHARLES SGMNER BROWN. Witnesses:

EDNA SPENNER,

H. S. CLARK;

